A few days ago, the most important green energy ETF since the first solar ETF’s launched arrived. The First Trust/Clean Edge Smart Grid ETF (GRID) offer a great, diversified way to play an emerging sector with great profit potential. The ETF is comprised of 29 companies with varying degrees of exposure to the smart grid space and the fund weights companies that are pure plays more heavily than those that aren’t. The top 3 holdings aren’t traded on US exchanges – SMA Solar Technology, Schneider Electric and NGK Insulators. The largest holding of the fund that trades on a US exchange is ITC Holdings (ITC) with Quanta Services (PWR) a close second. In my opinion, the smart grid plays are still undergoing a correction phase after a torrid run, so this ETF probably offers a better entry point down the road.